Micronutrient
Micronutrients are the vitamins and minerals the body needs in milligram or microgram quantities; they supply no calories, so a diet can hit every macro target and still be nutritionally poor.
Macros decide your weight. Micronutrients decide a lot of how you feel while it changes. They are invisible in a calorie count, which is exactly why a log that tracks only energy can be technically perfect and still leave someone tired.
The ones that go short most often
Iron, particularly in menstruating women and in people eating little or no meat; plant iron is absorbed less well, though vitamin C at the same meal helps. Vitamin B12, which occurs naturally only in animal foods and fortified products, so long-term vegetarians and vegans need a reliable source. Vitamin D, widely low wherever people spend most of the day indoors. Calcium, in diets without dairy. Iodine, where iodised salt is not used.
Why a deficit makes it harder
Eating less food means eating fewer micronutrients unless the quality of that food goes up. A 1,600 kcal diet built from vegetables, dal, curd, fruit and eggs covers far more than a 1,600 kcal diet built from biscuits and chai, even though both log identically.
The practical approach
Do not track them daily; almost nobody sustains that. Instead, build a plate with a protein source, a vegetable and a whole grain most of the time, and check the specific ones your diet pattern is known to miss.
Sources
- 1.Office of Dietary Supplements — National Institutes of Health
- 2.Recommended Dietary Allowances and Estimated Average Requirements for Indians, 2020 — ICMR–National Institute of Nutrition
Related reading
- What macros are, and which ones are worth counting
Protein, carbohydrate, fat and alcohol, what each supplies, and why calories plus protein is the two-number system most people should actually use.
- Losing fat on a vegetarian diet, without powder
The protein target is the hard part and it is reachable. Where vegetarian diets leak calories, which swaps pay for themselves, and a worked day.
- How to lose fat without quitting in three weeks
A deficit you barely notice, protein high enough to keep muscle, and a weekly trend to steer by. The whole method, and the parts people get wrong.
- Vegetarian protein worth the calories it costs
Ranked by calories per gram of protein, not by grams per 100 g. Which vegetarian sources are efficient, which are not, and how to build a 130 g day.